* {
    margin: 0;
    padding: 0;
    font-size: 16px;
}
body{
    position: relative;
}

a {
    text-decoration: none;
}

input,
button {
    background: transparent;
    border: 0;
    outline: none;
}

// .login-box ,.regist-box{
//     position: absolute;
//     height: 600px;
//     width: 100%;
//     background: linear-gradient(#141e30, #243b55);
//     display: flex;
//     justify-content: center;
//     align-items: center;
//     font-size: 16px;
//     color: #03e9f4;
// }
.loginBox ,.registBox{
    position: absolute;
    left:0;
    top:0;
    height: 600px;
    width: 100%;
    background: linear-gradient(#141e30, #243b55);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 16px;
    color: #03e9f4;
}
// .loginBox ,.registBox{
//     width: 400px;
//     height: 364px;
//     background-color: #0c1622;
//     margin: 100px auto;
//     border-radius: 10px;
//     box-shadow: 0 15px 25px 0 rgba(0, 0, 0, .6);
//     padding: 40px;
//     box-sizing: border-box;
// }
.login-box ,.regist-box{
        width: 400px;
        height: 364px;
        background-color: #0c1622;
        margin: 100px auto;
        border-radius: 10px;
        box-shadow: 0 15px 25px 0 rgba(0, 0, 0, .6);
        padding: 40px;
        box-sizing: border-box;
    }

h2 {
    text-align: center;
    color: aliceblue;
    margin-bottom: 30px;
    font-family: 'Courier New', Courier, monospace;
}

.item {
    height: 45px;
    border-bottom: 1px solid #fff;
    margin-bottom: 40px;
    position: relative;
}

.item input {
    width: 100%;
    height: 100%;
    color: #fff;
    padding-top: 20px;
    box-sizing: border-box;
}

.item input:focus+label,
.item input:valid+label {
    top: 0px;
    font-size: 2px;
}

.item label {
    position: absolute;
    left: 0;
    top: 12px;
    transition: all 0.5s linear;
}
// #demo > div > form > div.form > div.user_icon.item > label{
//     position: absolute;
//     left: 0;
//     top: 12px;
//     transition: all 0.5s linear;
// }
// #demo > div > form > div.form > div.user_icon.item>input:focus+label{
//     top: 0px;
//     font-size: 2px;
// }

.login-box,.regist-box{
    .loginBox,.registBox{
        
        .input-content{
            .form{
                .item {
                    label{
                        position: absolute;
                        left: 0;
                        top: 12px;
                        transition: all 0.5s linear;
                    }
                }l
                .item input:focus+label,
                .item input:valid+label {
                    top: 0px;
                    font-size: 2px;
                }
                
            }
        }
        
    }
}
.close_btn{
    position: absolute;
    right: 20px;
    top: 20px;
    color: #03e9f4;
    font-size: 30px;
    cursor: pointer;
}

.mybtn {
    padding: 10px 20px;
    margin-top: 20px;
    color: #03e9f4;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 2px;
    left: 35%;
}

.mybtn:hover {
    border-radius: 5px;
    color: #fff;
    background: #03e9f4;
    box-shadow: 0 0 5px 0 #03e9f4,
        0 0 25px 0 #03e9f4,
        0 0 50px 0 #03e9f4,
        0 0 100px 0 #03e9f4;
    transition: all 1s linear;
}

.mybtn>span {
    position: absolute;
}

.mybtn>span:nth-child(1) {
    width: 100%;
    height: 2px;
    background: -webkit-linear-gradient(left, transparent, #03e9f4);
    left: -100%;
    top: 0px;
    animation: line1 1s linear infinite;
}

@keyframes line1 {

    50%,
    100% {
        left: 100%;
    }
}

.mybtn>span:nth-child(2) {
    width: 2px;
    height: 100%;
    background: -webkit-linear-gradient(top, transparent, #03e9f4);
    right: 0px;
    top: -100%;
    animation: line2 1s 0.25s linear infinite;
}

@keyframes line2 {

    50%,
    100% {
        top: 100%;
    }
}

.mybtn>span:nth-child(3) {
    width: 100%;
    height: 2px;
    background: -webkit-linear-gradient(left, #03e9f4, transparent);
    left: 100%;
    bottom: 0px;
    animation: line3 1s 0.75s linear infinite;
}

@keyframes line3 {

    50%,
    100% {
        left: -100%;
    }
}

.mybtn>span:nth-child(4) {
    width: 2px;
    height: 100%;
    background: -webkit-linear-gradient(top, transparent, #03e9f4);
    left: 0px;
    top: 100%;
    animation: line4 1s 1s linear infinite;
}

@keyframes line4 {

    50%,
    100% {
        top: -100%;
    }
}
